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931	Pharmacology	ABS-456
Antihyperuricemia Activity Of Ethanol Extract And Fractions Of The A. Indica Leaves In Vivo And Mechanism Of Action Its As Inhibitory Of Xanthine Oxidase Enzyme Deden Winda Suwandi (a*), Sri Adi Sumiwi (b), Anas Subarnas (b) a) Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut, Indonesia *deden[at]uniga.ac.id b) Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Padjadjaran, Jatinangor, Sumedang, Indonesia Abstract Azadirachta indica, A., Juss is a medicinal plant that is used traditionally for some disease, especially its leaves are used to treat a rheumatic diseases and lower blood uric acid levels. This study has been carried out to examine antihyperuricemia activity of ethanol extract, water fraction, ethyl acetat fraction and n-hexane fraction of the A. Indica leaves in male mice of Swiss-Webster strain. Extract and fraction doses used were 125, 250, and 500 mg/kg bw. The tests were conducted on mice suffering from hyperuricemia induced by potassium oxonat intraperitoneally and chicken liver juice orally. Measurement of blood uric acid levels were performed every hour for 4 hours after being given test preparations. The results showed that the ethanol extract and the fractions lowered blood uric acid levels. The n-hexane fractions at the three doses showed the highest activity. Then, the most active fraction, n-hexane fraction, was tested for its inhibitory activity on xanthine oxidase enzyme to determine its mechanism of action. The results showed that the n-hexane fraction inhibited uric acid biosynthesis by inhibiting the activity of xanthine oxidase enzyme with the IC50 value of 132 microgram/mL. Keywords: A. indica leaves, Antihyperuricemia, Potassium oxonat, Xanthine oxidase PermaLink | Plain Format | Corresponding Author (Deden Winda Suwandi)

932	Pharmacology	ABS-209
ANTIOBESITY ACTIVITY OF ETHANOL EXTRACT AND VARIOUS FRACTIONS OF JAMBU AIR SAMARANG (Syzygium samarangense (Blume) Merr. & Perry) LEAVES ON WISTAR FEMALE RATS Atun Qowiyyah, Setiadi Ihsan, Siva Hamdani, Laelatus Syifa Department of Pharmacy,Faculty of Mathematic and Natural Science, UniversitasGarut Abstract Syzygium samarangense (Blume) Merr. & Perry was the lipase inhibitor that capable of inhibiting lipid absorption, so it assumes have a potency to be antiobesity agent. The aim of this study was to investigated the antiobesity effect of ethanol extract and various fractions of jambu air samarang leaves. The ethanol extracts were prepared by maceration method while fractination process was carried out using liquid-liquid extraction method. This study was conducted on Wistar female rats induced by high carbohydrate food for 45 days and MSG (Monosodium Glutamate) subcutaneous injection 2 g/kg body weight for 5 consecutive days followed by 14 days treatment. Induction with high carbohydrate food was continue during the treatment. Results showed that MSG and high carbohydrate food could induce obesity. The ethanol extract at a dose of 50 mg/kg bw; n-hexane and ethyl acetate fraction have antiobesity effect by inhibit body weight gain significantly different to positive control group (p <0.05). The biggest activity was shown by the n-hexane fraction. The ethanol extract; n-hexane and ethyl acetate fraction of jambu air samarang leaves did not have laxative and anorexic effect, also could not decrease fat deposition in liver organ and abdominal fat tissue Keywords: Jambu air samarang, obesity, ethanol extract, n-hexane fraction PermaLink | Plain Format | Corresponding Author (Atun Qowiyyah)

933	Pharmacology	ABS-737
The Effect of Gynura procumbens Leaves Extract to Reduce Dandruff on The Scalp Neneng Siti Silfi Ambarwati*, Rita Susesty, Devi Sulastiowati Department of Cosmetology, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, East Jakarta, Indonesia, 13220 Abstract Background: Gynura procumbens (Asteraceae family) is a medicinal plant commonly used in Asian countries such as China, Thailand, Indonesia, Malaysia and Vietnam. G. procumbens contain of flavonoids and glycosides and have bacterial activity and anti-fungal activity such as Candida albicans and Aspergillus niger. Purpose: The purpose of this study was to obtain empirical data about the effect of using the G. procumbens leaves extract on reducing dandruff on the scalp. Methods: Scalp observation by examiners by using observation sheets and grating instruments assisted by a skin and hair analyzer. Reduction of scalp dandruff was the difference between the results of the initial test and the final test (after treatment). The sample was selected using a purposive sampling technique totaling 10 people and divided into two groups (experimental group and control group). Results: The results showed that the calculation of hypothesis testing after analyzing the data obtained a value of t-count (5.817) > t-table (1.86). This showed that there was an effect of using the continued use of leaf extract as a shampoo for reducing dandruff on the scalp. Conclusion: The use of G. procumbens leaves extract as shampoo can reduce dandruff. Keywords: Gynura procumbens leaves extract, reduction of dandruff PermaLink | Plain Format | Corresponding Author (Neneng Siti Silfi Ambarwati)

934	Pharmacology	ABS-229
Formulation And Evaluation Of Ibuprofen Tablets Using Sago (Metroxylon sagu Rottb.) Starch as A Binder Nurul Auliasari (a*), Akmal Akmal (b), Aji Najihudin (a), Annisa Fadhilah (a), Siti Hindun (a) a) Program Studi Farmasi, Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA), Universitas Garut, Jl. Raya Samarang No. 52A, Garut 44151, Indonesia *nurul[at]uniga.ac.id b) Lembaga Farmasi Direktorat Kesehatan Angkatan Darat, Jl. Gudang Utara No. 26, Merdeka, Sumur Bandung, Kota Bandung 40113, Jawa Barat, Indonesia Abstract Sago is a staple food for most of the world population, its use is not only used in food products but also used in pharmaceutical products. Sago starch can be used as a binding material on tablets. This study aimed to develop formulation and evaluation of ibuprofen tablets using sago (Metroxylon sagu Rottb.) starch as a binder in making ibuprofen tablet preparations. Tablets made using wet granulation method with sago starch as a binder at various concentration. The evaluation includes of the granules and tablets. The result from dissolution test of ibuprofen tablets showed that the highest dissolved percentage was obtained in formula 1 compared to formulas 2 and 3. The results showed that sago starch could be used as binders on tablets and fulfilled the requirements on the evaluation of the granules and tablets. Keywords: Ibuprofen; Metroxylon sagu Rottb; Binder; Tablets PermaLink | Plain Format | Corresponding Author (Nurul Auliasari)

935	Pharmacology	ABS-232
Mangrove Plant Leaf Potential Weeds (Acanthus Ilicifolius) As Antidiabetic Elmiawati Latifah (a)*, Prasojo Pribadi (b), Dhuta Sukmarani (c) (a*), (b) Department Pharmacy, Faculty of Health Sciences, University of Muhammadiyah Magelang (c) Department Elementary School Teacher Education, University of Muhammadiyah Magelang Abstract Diabetes mellitus (DM) is a group of diseases characterized by high glucose levels in the blood resulting from a failure in insulin production or insulin action, or both. The specialty of Acanthus ilicifolius compared with other species when used for antidiabetic drugs is A. ilicifolius contains other secondary metabolites that are also good for health. This study aims to determine the effect of Jeruju leaf extract (A. illficolius) on the decrease of fasting blood glucose levels of rats and to know the most effective dose of A. ilcifolius extract on the reduction of fasting blood glucose levels of rats.This type of research is an experimental study of biomedical research design. The stages of this study consisted of sample preparation, identification of A. ilcifolius plant, leaf extraction of A. ilcifolius, qualitative analysis of saponin and tannin using thin layer chromatography method. Ethanol extract of A. ilcifolius with various doses, antidiabetic test in rats induced streptozotocin with categorized 15 animal samples into two control groups and three treatment groups and measured blood glucose level, followed by data analysis using ANOVA.The lowest activity occurred in negative control group, increased at dose 500 mg/kg, positive control and dose 250 mg/kg while the highest occurred in dose group 125 mg/kg. The result of statistic test with the parameter of decrease of fasting blood glucose level of the male rat of Wistar strain, in a group of jeruju leaf extract with dose 125 mg/kg and 250 mg/kg showed the significantly different result with a negative control group. Jeruju leaf extract with dose 125 mg/kg and 250 mg/kg have antidiabetic activity. Keywords: Extract, Jeruju Leaf, Antidiabetic PermaLink | Plain Format | Corresponding Author (Elmiawati Latifah)

936	Pharmacology	ABS-236
Microemulgel Formulation of Kepok Banana Skin Extract (Musa paradisiaca L) as an antioxidant FF Sriarumtias1, A Akmal2, A Najihudin1, IR Putri1, , S Hamdani1 1Program Studi Farmasi, Fakultas MIPA Universitas Garut, Jl. Raya Samarang No. 52A Garut, Indonesia 2Lembaga Farmasi Direktorat Kesehatan Angkatan Darat, Jl. Gudang Utara No. 26 Merdeka, Sumur Bandung, Kota Bandung, Jawa Barat Abstract Banana skin only becomes organic waste without being able to take advantage, so the purpose of this study is to utilize kepok banana skin into microemulgel which are stable and have antioxidant activity. The skin of kepok banana was extracted using maceration method with methanol solvent. The resulting extracts were then tested for antioxidant activity with the DPPH (1,1-diphenyl-2-pikrilhidrazil) method, obtained IC50 values of 659,544 ppm. Concentration extract in microemulgel formulation is one IC50 (F1), twice IC50 (F2), three times IC50 (F3) and positive controls containing vitamin C (F4). All formulas were evaluated including organoleptic, pH, viscosity, centrifugation, dispersion, irritation test and freeze and thaw. The evaluation results show that only formula F3 changes organoleptically and decreases viscosity. The testing of antioxidant activity microemulgel containing banana skin extract showed that F2 was the best formula on pharmaceutical requirements with the the IC50 638 ppm and good stability. For all formulas after an irritation test, no erythema or udema were found, so the irritation index was zero. The benefits of this study can provide an alternative source of phytocosmetic preparations as antioxidants and utilizing organic waste into something useful. Keywords: antioxidant, banana skin extract, dpph, microemulgel PermaLink | Plain Format | Corresponding Author (Framesti Frisma Sriarumtias)

937	Pharmacology	ABS-759
Scalp Dandruff Reduction Test Using Fresh Aloe vera Gel Mask Neneng Siti Silfi Ambarwati*, Titin Supiani, Nilam Amelia Laksmi Department of Cosmetology, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, East Jakarta, Indonesia, 13220 Abstract Background: Aloe vera is a medicinal plant that has been used since 1500 BC in many countries as a local medicine that has thick leaves flesh from the Liliaceae family. There are 75 compounds in Aloe vera gel have been found including 20 minerals (copper, iron, calcium, zinc, manganese, sodium, potassium, etc), 20 amino acids, vitamins (vitamins A, B, C, E, B12, folic acid ), salicylic acid, and water. Aloe vera was widely used for its antibacterial, anti-viral, anti-inflammatory, the lack of itching, and help prevent skin ulcers. Purpose: This study intends to investigate the effect of fresh Aloe vera gel mask in the reduction of scalp dandruff. Methods: Sampling was done by purposive sampling method as many as 10 people suffering from dry dandruff divided into 2 groups, namely 5 were given care using Aloe vera gel mask and 5 were given control mask treatment. Each sample received 3 treatments a week for 4 weeks. Observations before and after treatment were carried out by experts using a research instrument sheet assisted by a skin and hair analyzer. Test requirements analysis using the normality test and homogeneity test, and data analysis using the T-test. Results: The test results show data are normally distributed and homogeneous, t-count (3.376) > t-table (1.86). This showed that there the influence the used of Aloe vera to reduce dandruff on scalp. Obtained the average value of reduction in dandruff with use fresh Aloe vera gel mask was 0.800 greater than using control (0.699). Conclusion: The results of this study indicate that there influence of used Aloe vera gel mask on reduced dandruff on the scalp. Keywords: fresh Aloe vera gel mask, reduced dandruff PermaLink | Plain Format | Corresponding Author (Neneng Siti Silfi Ambarwati)

938	Pharmacology	ABS-254
INHIBITION OF SELECTIVE AND NON-SELECTIVE SICLOOXYIGENASE ON ANSIOLITIC EFFECTS INDUCED DIAZEPAM IN MICE Doni Anshar Nuari (a*), Cindra Tri Yuniar (b), Ahmad Jaidi (a), Siva Hamdani (a), Genialita Fadhila (a) a) Departement of Pharmacy, Faculty of Mathematics and Natural Sciences Universitas Garut, Garut, Indonesia *doni[at]uniga.ac.id b) School of Pharmacy, Institut Teknolonogi Bandung, Bandung40132 Abstract Stressful is the root from many problems sociological, medical, and economy. Stressful known is factor etiology from any diseases. Prostaglandin and fourth receptor big once the effect to the brain, and even influence behavior so that inactivation cyclooxygenase (COX) which causes decline prostaglandin levels to contribute on the development of stress, so suspected will give away decline effect work anxiolytic from Diazepam. Research when this test influence the administration of selective COX inhibitors and nonselective to effect Anxiolytic diazepam uses method EPM (Elevated Plus Maze) on mice white male. Group of animal Tragakan 2% , Diazepam 0.65 mg / kg BB, Diazepam 0.65 mg / kg BB one hours later Ketoprofen 6.5 mg / kg BB, Diazepam 0.65 mg / kg BW an hour later Selekoksib 6.5 mg / kg BB . Results showing happen decline duration on open arm group has given diazepam combination ketoprofen or celecoxib are different P value <0.05 than diazepam only. Decline duration highest showed by animals given celecoxib so that could be stated gift selective COX-2 inhibitors bring down effect anxiolytic diazepam bigger. Keywords: Anxiolytic, Cox Inhibitors, Diazepam, Elevated Plus Maze, Ketoprofen, Celecoxib PermaLink | Plain Format | Corresponding Author (Doni Anshar Nuari)

939	Pharmacology	ABS-255
ANTIHYPERLIPIDEMIA ACTIVITY OF Eleutherine palmifolia Merr. ETHANOL EXTRACTS ON WISTAR STRAIN RATS Doni Anshar Nuari (a*), Cindra Tri Yuniar (b), Aditya Siswanto (a), Sitti Fatimah Putri Hasyul (a), Tita Puspita (a) a)Departement of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Garut, Garut, Indonesia * doni[at]uniga.ac.id b) School of Pharmacy, Institut Teknologi Bandung, Bandung 40132, Indonesia Abstract Hyperlipidemia is a heterogeneous disorder that is usually characterized by increased levels of total cholesterol, low-density lipoprotein (LDL), very low-density lipoprotein (VLDL), triglycerides, and decreased levels of high-density lipoprotein (HDL) associated with an increased risk of coronary heart disease. Eleutherine palmifolia Merr. was used to treat hyperlipidemia so that this study was conducted to determine the antihyperlipidemic activity of ethanol extract of Eleutherine palmifolia Merr. Tests were carried out by exogenous and endogenous induction of Wistar strain white rats using high-fat foods and propylthiouracil. The parameters seen were total cholesterol, triglycerides, HDL-cholesterol and LDL-cholesterol. The results of research are at a dose of 100 mg/kgBW gave the best effect by reducing total cholesterol, LDL-cholesterol and triglyceride levels significantly different from positive controls (p <0.05). So that from the ethanol extract of Eleutherine palmifolia Merr. Has an antihyperlipidemic effect. Keywords: Antihyperlipidemia, Cholesterol, Eleutherine palmifolia Merr, Triglycerides PermaLink | Plain Format | Corresponding Author (Doni Anshar Nuari)

940	Physics	ABS-769
Profile Affective Abilities of Vocational Students in Electrical Energy Conservation Agus Kurniawan (a,b)*, Nuryani Y Rustaman (a), Ida Kaniawati (c), and Lilik Hasanah (c) a) Program Studi Pendidikan Ilmu Pengetahuan Alam, Sekolah Pascasarjana, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia b) Program Studi Teknologi dan Informasi, Sekolah Menengah Kejuruan Daarut Tauhiid, Jl. Gegerkalong Girang Kav. 25-26, Bandung 40154, Indonesia c) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung 40154, Indonesia *aguskurniawan[at]student.upi.edu Abstract The purpose of this study is to obtain an overview profile of the affective abilities of vocational students about the discourse of electrical energy conservation. The research method used is qualitative research which aims to explain the phenomenon of problems experienced by students in understanding the concept of electricity. Research activities are carried out in the odd semester of the school year 2017/2018. The subjects of the study were the students of class X in one of the Private Vocational Schools in Bandung consisting of one class chosen at random (random sampling). The results showed that the profile of affective ability which is a result of representation of the value or energy-saving attitude of students in SMK S Bandung is still low. This can be seen from the value of the average achievement of affective goals the willingness to respond, satisfaction in response, acceptance of value, preference for a value, commitment, and conceptualisation of values of 0.49 which is still in the low category. This shows that physics learning, especially on the concept of electricity at the SMK level has not been oriented towards affective goals. Keywords: Electrical energy conservation; Affective goals; Vocational school PermaLink | Plain Format | Corresponding Author (Agus Kurniawan)

941	Physics	ABS-518
Physics in geothermal power plants Dindin Nasrudin, Dewi Nopilawati, Chaerul Rochman, Yayu Nurhayati Rahayu, dan Diah Mulhayatiah UIN Sunan Gunung Djati Bandung Abstract Many students dont like physics because they feel far away from physics. Therefore physics must be made closer to students through contextual physics. This paper wants to describe the physical concepts that exist in geothermal power plants. The method used is descriptive. The results of the study show that there are many physics concepts that can be taught to students through observation and analysis of geothermal power plants such as the concepts of temperature, heat and displacement, electricity, energy and others. These physics concepts can be packaged in physics learning through the development of enrichment materials. It is hoped that there will be an increase in the mastery of concepts and literacy of students towards the surrounding natural resources. Keywords: electricity, geothermal, literacy PermaLink | Plain Format | Corresponding Author (Dindin Nasrudin)

942	Physics	ABS-1031
Study on mechanical properties of Metal Matrix Composites (MMCs) Al-Cu-Mg/SiCp with Powder Metallurgy Anggara B.S1, , Iwan Sugihartono1., Mangasi A. Marpaung1. Department of Physics, Faculty Mathematics and Natural Science, State University of Jakarta, Jakarta 13220 Abstract The synthesis of aluminum (Al) alloys, Al-Cu-Mg from mixture powder 88.4 wt% Al; 3.8 wt% Cu and 1.8 wt% Mg the adding 6.0 wt% up to 7.0 wt% of SiC on Al-Cu-Mg. After mixing the sample has been prepared by hot pressing process at a temperature of 350oC. After pressing sample has prepared by sintering one hour at a temperature 500oC and aging 16 hours. Al-Cu-Mg/SiC alloys samples has been investigated. The structure analysis were examined by X-Ray Diffractometer (XRD) and scanning electron microscope (SEM-EDX). The hardness was measured by hardness Vickers method. According to the results, it can be assumed that the 7 wt% of SiC content is prefer content to get better quality of hardness Vickers of Al-Cu-Mg alloys. Keywords: Al-Cu-Mg/SiC, hot press, XRD, Hardness Vickers PermaLink | Plain Format | Corresponding Author (Anggara Budi Susila)

943	Physics	ABS-786
DEVELOPMENT OF ANDROID-BASED MEDIA ON THE POINTS OF GLASS AND LENS winda setya (a*), Rizki Zakwandi (a) a) Department of Physic Education, Faculty Tarbiyah and Teacher Training, UIN Sunan Gunung Djati Bandung Jl. Soekarno-Hatta no. 750, Gedebage, Bandung *suratwindasetya[at]uinsgd.ac.id Abstract Android gives a great revolution to the world of education to develop learning applications that facilitate its use to study anywhere and anytime. This study aims to make Android-based media using app-inventor on glass and lens material. The development of this media uses R & D (research and development) research and development methods which consist of 4 stages, namely the analysis phase, design stage, production stage, and evaluation stage. The results of using Android-based media have an average value of questionnaires from material experts, media experts, and small-scale trials categorized very well close to 50%. Based on these results it can be stated that the lens and glass media based on Android can be used as a medium of learning in the classroom. The development of this Android-Based Physics Application is expected to be an alternative for educational institutions or educators to develop learning media that use multimedia. Keywords: Android, Media, Glass, Lens, Physic PermaLink | Plain Format | Corresponding Author (winda setya)

944	Physics	ABS-21
A Study of Radiation Dose for the Anticipated Accident Condition in the SAMOP Reactor Experimental Facility Mahrus Salam*, Elisabeth S., Syarip Center of Science and Accelerator Technology, Nuclear Energy Agency (BATAN) Indonesia *mahrus.salam[at]batan.go.id Abstract A study of radiation dose for the accident condition in the Subcritical Assembly for 99Mo Production (SAMOP) reactor experimental facility has been done. The main purpose of this study is to estimate the radiation dose received by worker as well as society during accident condition in the SAMOP reactor experimental facility. In this study, one of the worst accident scenario that has the highest probability is postulated as one of TRIGA fuel fall down in to the SAMOP reactor core during loading-unloading process. That accident inflicts one of this TRIGA fuel broken and radioactive materials are released. The radiation dose is estimated based on the radioactive source-term from ORIGEN 2.1 computer code calculation. Furthermore, the total effective dose equivalent (TEDE) received by the society is calculated using dispersion model of Hotspot 3.0 computer code. From this study, the total radiation dose received by the radiation worker during this accident condition is 4.5 mSv and the maximum TEDE received by society during this accident condition is 0.031 mSv. This study shows that the radiation dose received by worker as well as society during this accident condition is still below the limit appointed by regulatory body (BAPETEN). Keywords: SAMOP, Accident, Source-term, Radiation Dose, Dispersion PermaLink | Plain Format | Corresponding Author (Mahrus Salam)

945	Physics	ABS-28
Fission Product Gas Pressure and Radioactivity Analysis of SAMOP Reactor Experimental Facility Syarip Syarip, Puradwi Ismu Wahyono, Edi Trijono Budisantoso Centre for Science & Accelerator Technology, National Nuclear Energy Agency, Yogyakarta 55281, Indonesia. Abstract The fission-product gas pressure and radioactivity analysis of a sub-critical assembly for Mo-99 production (SAMOP) experimental facility have been done. The SAMOP reactor core is an annular tube surrounded by a ring of fuel tubes, fueled with low enriched uranyl nitrate UO2(NO3)2 of 300 g U/L. The reactor is designed to be operated at 100 to 120 hours periodic operation per batch. The calculation method is done by using ORIGEN2 computer code, for the condition of the maximum fuel temperature 54 C, 120 hours reactor operating time, and neutron flux is varied from 10^10 to 10^12 n/cm^2s. The result shows that the inventory of the gaseous fission products consisted of xenon, radium, helium, and tritium isotopes with the total activity of 1.3576x10^13 Bq (366.9158 Ci) and total gas volume 0.0969 cm^3. Total pressure due to the fission product gases is 5.78 kPa, this is very small, therefore the pressure monitoring in the SAMOP reactor core is not necessary. The isotopes of xenon and krypton are the major contributors to the total gas pressure. The release probability of these volatile fission products is very small, whiles SAMOP reactor does not have open nuclear material, therefore no special ventilation system is required. Keywords: SAMOP, reactor, subcritical, fission products, radioactivity, gas pressure. PermaLink | Plain Format | Corresponding Author (Syarip SYARIP)

946	Physics	ABS-543
COATING OF TiO2 NANOPARTICLES IN THE SURFACE OF TRANSPARENT PLASTIC GRAINS AND ITS APLICATION FOR PHOTOCATALYST UNDER SOLAR IRRADIATION I F Amalia 1*, S Gumilar1, A Ismail1, L Amalia2, M Abdullah3 1Department of physics education, Institut Pendidikan Indonesia, Jl. Pahlawan No.32, Garut 44151, Indonesia 2Department of biology education, Institut Pendidikan Indonesia, Jl. Pahlawan No.32, Garut 44151, Indonesia 3Department of physics, Institut Teknologi Bandung, Jl. Tamansari No.64, Kota Bandung 40116, Indonesia Abstract A cylinder milling has been modified by adding a heating controller for coating TIO2 photocatalyst on the surface of polymer at constant temperature. By testing the polystyrene, polypropylene, and linear-low-density polyethylene polymer density before and after coating, it is obtained that polypropylene polymer is suitable for polymer-coated TIO2 because the surface is transparent and can remain floating on the surface of water although it has been coated with TIO2 catalyst. Coating process of TIO2 nanoparticles on the surface of the polypropylene is performed through three stages, that is stirring while heating in the cylinder milling, washing, and drying. The coating temperature is 1100C for 90 minutes. Photocatalytic activity was observed by testing the photodegradation of methylene blue dissolved in water using a container with a surface area 750 cm2 and illuminated by sunlight for 12 days. The experiment was done at 6 containers with similar volume and area and variable amount of catalyst, which is without catalyst (0 g) to 5 layer of catalyst (550 g). From the colour, turbidity, and UV-Vis characterization, the methylene blue decomposition effectively occurred with amount of 220 g catalyst (2layer of catalyst). Keywords: cylinder milling, TiO2, polypropylene, methylene blue, photodegradation PermaLink | Plain Format | Corresponding Author (Irma Fitria Amalia)

947	Physics	ABS-312
Effecs of Variations in the Addition of SiCp Filler to Corrotion Rate at Metal Matrix Composites (MMCs) Al-Cu-Mg/SiCp Anggara Budi Susila, Erfan Handoko, Riser Fahdiran Department of Physics, Faculty of Mathematics and Natural Science, State University of Jakarta, Jakarta 13220. Abstract We study of effecs Al-Cu-Mg/SiCp Metal Matrix Compsite (MMCs) with a matrix composition of 4.4 wt% Cu, 1.8 wt% Mg with SiCp fillers were varied (3.4; 3.7 and 4.0) wt% and the remaining Al. SiCp is mixed into Al-Cu-Mg heated at 900oC, then stir casting is carried out at 250 rpm for 10 minutes. Then cooling are carried out to room temperature. After cold, heat treatment is given and continued testing. The SEM-EDX and XRD test results showed that the increasing SiCp content, the tendency for SiCp and Mg bonds to form the Mg2Si phase increased, making the sample items enlarge and appear more coarse. While the corrosion rate test of increasing SiCp in the Al-Cu-Mg matrix makes Al-Cu-Mg/SiCp samples tend to be more corrosion resistant. The event of declining corrosive properties is due to SiCp particles occupying grain boundary areas replacing O2 (which provides corrosive properties) that are trapped in the sample during the cooling process. Keywords: Al-Cu-Mg/SiCp casting stir, SiCp filler, corrosion rate PermaLink | Plain Format | Corresponding Author (Anggara Budi Susila)

948	Physics	ABS-57
Scaffolding in Conceptual Science Isrokatun (a*), Dita Anggita (b), Budi Sigit Purwono (c), Cucun Sunaengsih (d), Aah Ahmad Syahid (e) a) Universitas Pendidikan Indonesia *isrokatun[at]upi.edu b, d, e) Universitas Pendidikan Indonesia c) SMP N 2 Brebes, Jawa Tengah Abstract Scaffolding is a technique that can be used to make learning more meaningful. It is designed to help students realize their goals and provide support for students in need in the learning process. It is important to understand that students have their own development tempo, or better known as Zone Proximal Development (ZPD). Therefore, the teacher can conduct the learning process in accordance with the ZPD of each student. This individual difference will affect the students learning process and outcome. This study, which was conducted using descriptive qualitative design, was aimed at describing the application of scaffolding in each stage of Situation-Based Learning (SBL) in the topic of Force. Respondents in this study include fifth-grade primary school students aged 10 to 12 years old. The study found that optimal scaffolding could maximize students learning processes in understanding the concept of Force. This maximum learning process could later affect the quality of the students learning outcomes. Keywords: Concept of Force; Learning Process; Primary School Students; SBL; Scaffolding; ZPD PermaLink | Plain Format | Corresponding Author (Isrokatun Isrokatun)

949	Physics	ABS-321
Improving Student Science Literacy through STEM Learning in Global Warming Materials Devi Nurrahma Wulandari (a), Cecep E Rustana (b), Riser Fahdiran (b) (a) Jl. Maulana Hasanudin No.63, Cipondoh, Kota Tangerang, Banten 15148, Indonesia (b) Physics Education Study Program, University of Jakarta, The way the Youth No.10, Rawamangun - East Jakarta, 13220 Abstract STEM learning provides students with knowledge and concepts that have relationships and applications in everyday life. In addition, students are given many opportunities to develop the ability to think and literate through the process of engineering design based on scientific knowledge. The purpose of this study was to identify the effects of STEM learning in improving scientific literacy of students at high school level. This study explores the integration of STEM performance to develop students scientific literacy. Learning Physics on the topic of global warming is implemented to produce solar cooker products. Data was collected from field notes, and scientific literacy tests with the value of student can describe and carry out experimental procedures 50%, student can demonstrate logical reasoning in explaining natural phenomena, experimental procedures or outcomes, and application of scientific or technological concepts 100%. Finally, the implementation of the STEM project in physics has provided opportunities for students in physics learning involvement and the development of scientific literacy. Keywords: STEM Learning, Science Literacy PermaLink | Plain Format | Corresponding Author (Devi Nurrahma Wulandari)

950	Physics	ABS-324
Waste as an energy source: A review of physics Dindin Nasrudin, Febi Eka Rachmadanti, Chaerul Rochman, Diah Mulhayatiah, Mila Faizatul Millah, and Adam Malik Prodi Pendidikan Fisika UIN Sunan Gunung Djati Bandung Abstract Waste is still a problem in certain areas. It is necessary to innovate the use of waste into a useful material, one of which is an energy source. This paper aims to describe the physical concepts that exist in the processing waste into an energy source. The method used is descriptive. This research shows that there are several physics concepts that play a role in the processing of waste into energy sources: force, pressure, fluid, energy, thermodynamics, electricity and others. This study concluded that the waste treatment process contains many physical concepts that can be packaged in the form of physics enrichment materials. The development of physics enrichment materials is expected to improve student literacy and awareness of waste and the physical concepts contained in it. Keywords: electricity, power, waste PermaLink | Plain Format | Corresponding Author (Dindin Nasrudin)

951	Physics	ABS-86
Structural, Optical, and Room Temperature Dielectric Properties of (La1-xAx)FeO3 (A = Mg, Sr, Bi) Perovskite Nanomaterials Ngia Masta (a*), Rifqi Almussawi Rafsanjani (b), Djoko Triyono(b) a) Physics Education Program, Faculty of Education and Pedagogy, Universitas Kristen Indonesia Jalan Mayjen Sutoyo No. 2, DKI Jakarta 13630, Indonesia *ngia.masta[at]uki.ac.id b) Physics Departement, Faculty of Mathematics and Natural Science, Univeritas Indonesia Jl. Margonda Raya, Depok, Jawa Barat 16424, Indonesia Abstract This paper investigated the variation of structure and electrical properties of Lathanum Ferrite Oxide perovskite-based material. The A site of this perovskite dopped Mg, Sr, and Bi. The (La1-xAx)FeO3 samples were synthesized by sol gel method. For the present research study, the structure, of this material investigated by X-ray diffraction (XRD). For the surfaces and morphology structure this material, we are using Scanning Electron Microscopy (SEM), and then the electrical properties of this materials were investigated by using RLC Meter, the data plotted by using bode and nyquist plot. The optical band gap energy obtained by using Uv-vis spectroscopy and employed Kubelka-Munk method This lanthanum ferrite oxide-based perovskite has been reported as potential ionic conductivity materials at room temperature. Keywords: Sol-gel, Perovskite, Structure, Band gap, ionic conductivity. PermaLink | Plain Format | Corresponding Author (Ngia Masta)

952	Physics	ABS-600
APPLICATION OF THE CONTEXTUAL TEACHING AND LEARNING MODEL (CTL) AS AN EFFORTS TO IMPROVE STUDENT RESULTS AND SCIENTIFIC PERFORMANCE OF STUDENT PHYSICS Gede Yohanes Arygunartha, S.Pd., M.Pd FIS, Dr. Ir. Yohanes Parlindungan Situmeang, M.Si Warmadewa University Jalan Terompong 24 Tanjung Bungkak, Denpasar, Abstract This study aims to improve student learning outcomes and scientific performance of physics. This research is a classroom action research. Subject from this study were students of class XI odd school year 2018/2019 as many as 19 male students. This research implemented in two cycles with each cycle stage consisting of planning, action, observation / evaluation, and reflection. The results of this study indicate that 1) there is an increase in students scientific performance. In the first cycle the average value of performance the scientific achievement of students is 77.37 with a fairly high category, while at the second cycle increased to 87.90 with a very high category, 2) an increase student physics learning outcomes. In the first cycle the average value of physics learning outcomes is achieved students are 73.00 while in cycle II it increases to 77.50. Research This class action is categorized as successful because it has reached the level of completeness  amounting to 94.7% Keywords: Learning model of Contextual Teaching and Learning, Learning Outcomes, Scientific Performance. PermaLink | Plain Format | Corresponding Author (Gede Yohanes Arygunartha, S.Pd., M.Pd FIS Anes)

953	Physics	ABS-856
Kalman Filtering to Real-Time Trace Water Level Measurements using Ultrasonic Sensor Fatoni Parmono, Bambang Heru Iswanto, Mutia Delina Department of Physics, Universitas Negeri Jakarta, Jakarta 13220, Indonesia Abstract Water level measurement is a very important task, especially to obtain information about the availability of water in a reservoir or overflow of river water in flood management. In this paper, we investigate the water level management using ultrasonic sensor to get data in real time. The monitoring system consist of an ultrasonic sensor, LCD displays, and resource tank interfaced with Arduino. To improve the accuracy of the measurement results we introduced the Kalman filter, an algorithm that uses a series of measurements observed over time to produces estimates of unknown variables by estimating a joint probability distribution over the variables for each time frame. This technique is applied for improving the precision of trace water levels based on ultrasonic sensors in the presence of various noise sources. Filter performance is demonstrated to be adaptive to real-time noise. The effectiveness of this technique is evaluated by measuring the water level in the disturbed container with three different levels. Experiment results indicated reducing the errors of measurement significantly up to 60% for a high disturbed water level condition. Keywords: Kalman filtering, ultrasonic sensor, water level measurement PermaLink | Plain Format | Corresponding Author (BAMBANG HERU ISWANTO)

954	Physics	ABS-1116
The Effects of Polaron on the Transport Properties of Anatase TiO2 Annamaria Bupu and Muhammad Aziz Majidi Department of Physics, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Indonesia, Depok 16424, Indonesia Abstract Anatase TiO2 is one of the most attractive transition metal oxides due to its properties and its potential applications. However, transport properties of this material is still need to be explored. Recent experimental study on this materials shows that carrier concentrations and temperature affects the transport properties of anatase TiO2, but the mechanism that govern the properties have not been explained yet. Thus, in this work we present a theoretical study which investigates the transport properties of anatase TiO2 in order to model the previous experimental results. We hypothesize that electron-phonon coupling with intermediate coupling constant (large polaron) play a role on the transport properties of this material. We use Holstein model of electron-phonon interactions which then solve within Dynamical Mean Field Theory (DMFT). In this model, we tune the electron-phonon coupling constant into a value that represent the large polaron then calculate the transport properties, that is, the temperature dependent resistivity of anatase TiO2. Keywords: anatase TiO2; large polaron; Holstein Model; DMFT PermaLink | Plain Format | Corresponding Author (Annamaria Bupu)

955	Physics	ABS-628
OPTIKU : Pocket Book about Optics Concept Based on Android H Y Suhendi*, D Mulhayatiah, W Setya, N Fitriyanti Pendidikan Fisika UIN Sunan Gunung Djati Bandung *herni.suhendi[at]uinsgd.ac.id Abstract Teaching materials are one of the factors to support the achievement of learning objectives. This is related to the use of appropriate and varied teaching materials in the learning process can increase learning motivation and can reduce the passivity of students. This study aims to produce an android-based digital pocket book product that is feasible for learning. In addition, to find out the increasing interest and ICT skills of students. This research is a research development (R & D) with 4D models. Media validity analysis technique uses (Content Validity Ratio) CVI. Techniques for analyzing increased interest and ICT capabilities use standard gain. The results showed students learning interest had increased in a limited test with a standard gain of 0.450 (moderate) and a broad test of 0.638 (moderate) while the student learning outcomes had increased in a limited test with a standard gain of 0.732 (high) and a broad test of 0.866 (high) . It can be concluded that OPTIKUs pocket book is suitable for widespread use. Keywords: pocket book, optics concept, android PermaLink | Plain Format | Corresponding Author (Herni Yuniarti Suhendi)

956	Physics	ABS-373
Self-Consistent Charge Density Functional Tight-Binding (SCC-DFTB) Parameterization for Boron Clusters: Repulsive Potential Study Wafa Maftuhin Faculty of Engineering and Technology, Sampoerna University, South Jakarta 12780, Indonesia Abstract We present a self-consistent charge density functional tight-binding (SCC-DFTB) parameterization for boron clusters. In the parameterization we devote more attention to the repulsive energy in the SCC-DFTB theory and examine the quality of the parameter fitted to different sets of reference structures. To test the quality of the parameter, we combine the SCC-DFTB with modified basin hopping method (MBH) to search for global minima of small boron clusters Bn (n=3-13). In closer examinations, we found the repulsive potential fitted to trimer is a compromise among the reference structures judging from the variation of the potential curve and the geometry that it yields. On comparing further our calculated lowest energy boron clusters are very good agreement with other theoretical calculations. Keywords: Density Functional Tight Binding; Repulsive Potential; Boron Clusters PermaLink | Plain Format | Corresponding Author (Wafa Maftuhin)

957	Physics	ABS-896
Band gap control of bilayer zigzag graphene nanoribbon by direction of magnetic moment Teguh Budi Prayitno, Riser Fahdiran Universitas Negeri Jakarta Abstract We have demonstrated the first-principles calculation to tune the band gap of bilayer zigzag graphene nanoribbon by arranging the direction of magnetic moments of carbon atom at the edges. This direction was specified by the polar angle as defined in the spherical coordinates. From the ferromagnetic configuration to the antiferromagnetic configuration, as the polar angle increases the band gap increases. We also showed that the ferromagnetic configuration leads to the metallic system while the others leads to the insulator, in a good agreement with previous calculations. This results indicated that the bilayer zigzag graphene nanoribbon is potential for the spintronics devices. Keywords: Graphene nanoribbon, band gap, first-principles calculations PermaLink | Plain Format | Corresponding Author (Teguh Budi Prayitno)

958	Physics	ABS-386
MATERIALS OF NATURAL SCIENCE BASED PROBLEM CHARACTERS ON LIGHT AND OPTICAL CONCEPT T Tirmayasari (a*), A Wahab Jufri (b), A Harjono (c) University of Mataram Abstract The purpose of this research was to develop learning materials of natural science of characters-based problem on light and optical concept in junior high school Four East Praya. Method of the research is descriptive, evaluative, and experimental. Research and development study refering to Dick & Carey design namely: identify instructional goal, conduct instructional analysis, analyze learner and contexts, write performance objektives, develop assessment, develop intrucsional strategy, develop and select instructional material, design and conduct formative evaluation of instruction, revise instruction, design and conduct summative evaluation. The formative evaluation stage was done by: the validation of the learning materials by three experts, the limited trials on the learning materials of natural science and teaching tools (syllabus, lesson plan, and students worksheets) held in eighth grade, and validity and reliability test instruments (critical thinking skill tests, scientific attitude, and character questionnaire) held in ninth grade. The expert test results showed that learning materials of natural science were feasible, teaching tools very feasible for use in limited trials. In conclusion, learning materials of natural science of characters-based problem on light and optical concept was feasible to be applied in science learning processes. Keywords: learning materials of natural science, problem-based, and character PermaLink | Plain Format | Corresponding Author (tir mayasari)

959	Physics	ABS-645
ANALYSIS OF URANYL NITRATE HEXAHYDRATE COMPOSITION FOR OPTIMUM NEUTRON MULTIPLICATION FACTOR OF SAMOP WAHYONO PI, SYARIP CENTER for ACCELERATOR SCIENCE AND TECHNOLOGY, NATIONAL NUCLEAR ENERGY AGENCY Abstract ABSTRACT: Subcritical Assembly for Molybdenum Production (SAMOP) is a concept of nuclear reactor where the neutron multiplication factor (k-eff) less than one (k-eff ~ 0.99). Therefore, SAMOP reactor need an external neutron source for its operation. Uranyl Nitrate Hexahydrate, UO2(NO3)2or UN is used as fuel as well as target material for Mo-99 production.The Mo-99 isotope is used to generate Tc-99m which is the most widely radioisotopesused for diagnostic in nuclear medical fields. The composition of Uranyl Nitrate Hexahydrate (UNH)should be analyzed to achieve the required subcriticallevel in the SAMOP corei.e. k-eff ~ 0.99. Methodology for this analysis is a calculation of subcritical level of SAMOP by using WIMSDcomputer code. Using enrichment of uranium of 19.75% with 2.81 gr/cc of density, the composition shown 0.251724 for U and 0.748276 forN,O and H. The composition is then used as input for the neutronic analysis using the ORIGEN computer code as well as calculation of neutron source and thermal power of SAMOP. The result shows that the optimum k-eff is 0.9919 with the composition of U-235, U-238, N, O, H, U, N-O-H are 0.049715, 0.202009, 0.053448, 0.374138, 0.32069, 0.251724, and 0.748276 respectively. Keywords: Uranyl Nitrat, Subcritical Assembly PermaLink | Plain Format | Corresponding Author (Puradwi Ismu Wahyono)

960	Physics	ABS-650
The Evaluation of Physical Qualities of Pellet ContainingIndigofera zollingeriana and Banana Hump that Fermented by Trichoderma harzianum T. Rohayati,I. Hadist, M. Royani, M. Puspitasari Animal Faculty of Agriculture, Universitas Garut, Jl. Raya Samarang 52 A Garut, Indonesia, tatirohayati[at]uniga.ac.id Abstract This study aims to determine the amount of Indigofera zollingerianaand banana hump that fermented byTrichoderma harzianumas a substitute for soybean meal and rice bran in ration on the physical qualities of pellets. The research method was experimental using a completely randomized design with a factorial pattern consisting of two factors and each five treatment andtwo replications. Experimental data were analyzed by analysis variance, then to find out the differences between treatments were analyzed by Duncans Multiple Range Test. The results showed that there was an interaction between the use of Indigofera zolingeriana and banana hump durability and density of pellet. The highest pellet durability was obtained by using 26% Indigofera zollingeriana and 1.25% banana hump, while the highest pellet density was obtained using 0% Indigofera zollingeriana and 1.25% banana hump. Keywords: Pellet, physic, durability, density PermaLink | Plain Format | Corresponding Author (Tati Rohayati)

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